Collection Summary
Nerodia erythrogaster (Plain-bellied Watersnake) has a total of 360 valid, non-duplicated collections representing 43 counties and 154 localities. There are a total of 80 collectors and 140 collection dates for the species. This results in a total of 149 expeditions for the species, a measure of unique date / collector(s) combinations. The earliest collection year for the species in Missouri is 1898 and its most recent collection year is 2021. The earliest and latest collection dates (independent of earliest and most recent collection years) are March 2 and November 3, respectively. If you have a new record to report, read the New Records section of the FAQ.
Collection Summary by County
| County | Localities | Collections | Collectors | Dates | Expeditions | Earliest Year | Latest Year | |
|---|---|---|---|---|---|---|---|---|
 | Barton | 5 | 5 | 3 | 4 | 4 | 1935 | 2020 |
| Bates | 5 | 5 | 3 | 4 | 4 | 1988 | 2020 |
| Bollinger | 7 | 10 | 11 | 10 | 10 | 1931 | 2009 |
| Buchanan | 1 | 1 | 1 | 1 | 1 | ||
| Butler | 8 | 23 | 8 | 7 | 8 | 1898 | 1949 |
| Cape Girardeau | 1 | 1 | 1 | 1 | 1 | 1994 | 1994 |
| Cass | 3 | 3 | 3 | 3 | 3 | 1959 | 2008 |
| Cedar | 1 | 1 | 1 | 1 | 1 | 2002 | 2002 |
| Chariton | 8 | 9 | 4 | 6 | 6 | 1938 | 2015 |
| Christian | 1 | 1 | 2 | 1 | 1 | 2002 | 2002 |
| Clay | 1 | 1 | 1 | 1 | 1 | 1968 | 1968 |
| Dade | 2 | 2 | 3 | 2 | 2 | 1992 | 2003 |
| Dunklin | 14 | 19 | 11 | 14 | 15 | 1907 | 2007 |
| Henry | 2 | 8 | 3 | 3 | 4 | 1938 | 1941 |
| Howell | 1 | 1 | 1 | 1 | 1 | 2006 | 2006 |
| Jackson | 1 | 1 | 1 | 1 | 1 | 1908 | 1908 |
| Jasper | 5 | 5 | 5 | 5 | 5 | 1961 | 2015 |
| Johnson | 6 | 9 | 6 | 6 | 7 | 1937 | 1976 |
| Lafayette | 2 | 2 | 3 | 2 | 2 | 1992 | 1992 |
| Lawrence | 1 | 1 | 3 | 1 | 1 | 2015 | 2015 |
| Lincoln | 2 | 2 | 1 | 2 | 2 | 1996 | 2021 |
| Linn | 1 | 2 | 1 | 1 | 1 | ||
| Livingston | 4 | 37 | 2 | 3 | 3 | 1940 | 2021 |
| McDonald | 3 | 4 | 3 | 3 | 3 | 1930 | 2003 |
| Mississippi | 10 | 29 | 6 | 12 | 12 | 1936 | 1987 |
| New Madrid | 2 | 3 | 3 | 2 | 2 | 1962 | 1995 |
| Newton | 5 | 6 | 6 | 5 | 5 | 2001 | 2012 |
| Oregon | 2 | 2 | 3 | 2 | 2 | 1974 | 2005 |
| Ozark | 2 | 2 | 2 | 2 | 2 | 1968 | 1975 |
| Pemiscot | 3 | 5 | 2 | 2 | 3 | 1923 | 1923 |
| Perry | 3 | 3 | 3 | 2 | 3 | 1994 | 2011 |
| Pettis | 1 | 1 | 1 | 1 | 1 | 1997 | 1997 |
| Pike | 1 | 1 | 1 | 1 | 1 | 1995 | 1995 |
| Platte | 1 | 15 | 1 | 1 | 1 | 1958 | 1958 |
| Ripley | 3 | 3 | 2 | 3 | 3 | 1967 | 1970 |
| Saint Charles | 4 | 4 | 4 | 4 | 4 | 1983 | 2010 |
| Saint Clair | 2 | 2 | 5 | 2 | 2 | 2012 | 2012 |
| Sainte Genevieve | 1 | 1 | 3 | 1 | 1 | 2020 | 2020 |
| Scott | 1 | 1 | 2 | 1 | 1 | 1954 | 1954 |
| Stoddard | 9 | 26 | 19 | 19 | 20 | 1935 | 2019 |
| Stone | 1 | 1 | 1 | 1 | 1 | 1927 | 1927 |
| Vernon | 13 | 97 | 6 | 14 | 14 | 1934 | 2020 |
| Wayne | 4 | 4 | 5 | 4 | 4 | 1939 | 2003 |